Dishwasher



May 9, 19337 x.,RoDEwALD 1,908,617

DI SHWASHER Filed June 28,. 1930 2 Sheets-Sheet Al ffm.-

2/a /fv Vzw/Tale.'

2 7 Job/7 @adema/d) May 9, 1933.l

J. RODEWALD DIsHwAsHER 35 face already covered with Water.

-Patented May 9, 1933 UNITED STATES PATENT OFFICE JOHN RODEWAIJ), OF LOS ANGELES, CALIFORNIA, ASSIGNOR TO NATIONAL AUTOMATIC DISHWASHER C0., LTD., OF LOS ANGELES, CALIFORNIA, A CORPORATION OF GALI- FOB-NIA.

nrsmvasnnn.

.applicativa med :une 2s, 1930. seal No. 464,468.

arranged to hold dishes in a special predetermined position when. stacked, and, in conjunction with said special arrangement of dishes, I use a specially shaped rotating sprayer. The sprayer is adapted to rotate 'under the 15. force of expelled water, and is equipped with nozzlesarranged to spray Water againstthe dishes in a manner to produce a Water sweeping action across the surface of each dish. The sweeping action of the Water washes from one side of the dish to the other, and dislodges any foreign matter that may be upon the surface.

The purpose of forcing the water to travel as a sheet in one direction across the dish Y surface is to eliminate any countercurrents and any diminished Washing effects, due to the interference of sprays or splashings when the sprays strike the dishes. It isevident that if the' individual sprays were allowed to strike the dishes in a haphazard manner. a large percentage of washing eiiiciency would be lost, since a great deal of the kinetic energy of the Water would be spent in striking a sur- The Washing action actually produced in my machine corresponds very closely to the action of a wash cloth moved over the surface of the dish.

A noteworthy feature of my arrangement resides in the provision of means on the rotatable sprayer for regulating the speed of rotation. Other features will become apparent in the following description taken in conj unction with the draw' gs in Which- Fig 1 is a vertical section taken substantially on the line 1-1 of Fig. 2;

Fig. 2 is a horizontal plan section taken on thi"l line 2-2 of Flilg. 1; nlr

ig. 3 is an e ar e a entar view taken on the line of F y In the drawings, which illustrate one embodiment of my invention, I have shown a hood or container, generally designated A,

having demountably mounted therein a rack, generally designated B, and a Water propelled rotor, shown at C. Suitable means is provided for mounting the container upon a base, such as shown at D. The container A` is equipped with a domed upper portion 11 having a closure 11' which, in this instance, is shown as comprising substantially half of the dome 11, pivotally mounted at 12, and arranged to rotate in a manner to open substantially half the dome. p

In respect to the opening and closing of the container, I may employ other means,

such as fiat lids, hinged l1ds, or any other suitable closure elements. Water sealing means is provided in conjunction with the,

closure 11'-, and, as shown, comprises a lip 13 which is arranged to drain water back into the interior of the container. A closure grip 14 is also mounted upon the closure 11, and 'Y provides a means of manuallyopening and closing the container. Mea-ns is also provided for draining the'container, and comprises apipe 15 suitablyconnectedto the bottom of the'conta'iner at any convenient location. More specifically describing the rotor element C, it is illustrated as being substantially S-shaped, i. e., the outwardly extending ends are curved in reverse directions.

This feature is important and will be discussed later in connection with the arrangement for stack ing dishes upon the rack B. The upper sur-A face of the rotor C is provided with small holes 16 arranged to project fine vertical needle-like sprays of Water. The jets or nozzle openings 16 are spaced longitudinally of the' V outward movement.

rotor sprayer C, and a line passingthrough the center ofthe several openings 16 is substantially S-sha-ped, that is, the line follows the longitudinal contour of the rotor C. The outer ends of the rotor C areequipped with a member 17, which may be termed the driving member, This member, as illustrated in the broken-away section in Fig'. 1, is provided with screw threads 18 adapted to engage a screw-threaded opening 19 in the rotor C. It is also provided with an aperture 20 adapted to project water for the purpose of driving the rotor. It is obvious that as the aperture 20 is rotated from a vertical angle to a horizontal angle, the speed of rotation will be correspondingly increased. In

order that the members 17 may be properly rotated, they are formed with screw-driver slots 21 on the head thereof. In this respect, it may be stated that other expedients, such as thumb nuts, hexagonal nuts, or the like, may be employed for the same purpose.

Mfeans is provided for rotatably mounting the rotor upon the bottom of the container, and, as shown in Fig. 3, comprises a member 21a secured to the rotor C by means such as soldering or welding, as shown at 22, said member 21 having an inwardly extending flange 23 arranged to rotatably support a sleeve 24 having an outwardly extending fiange 25.

The member 21a is itted over an opening 26 in the rotor C. The sleeve 24 extends outwardly from the member 21 and into a nut 27, the nut 27 being formed with an inwardly extending flange 27', and the end of the sleeve 24 being crimped over the iange 27 as shown at 29. The nut 27 may then be attached to any standard coupling on the bottom of the container. In assembling the structure just described, the sleeve 24 is first placed in the member 21, and the nut 27 is itted over the outer end of the sleeve 24, and the end of the sleeve 24 is crimped as before stated.

This structure clearly provides a rotatable water joint of simple, efficient, and durable construction, and one in which none of the p'arts are detachable andsubject to misplacement. This -is a feature of particular value in machines of this sort, since it often becomes necessary to remove the rotor for purposes of cleaning, etc. A conduit 29 is provided for conducting hot water to the rotor, and may be attached to the bottom of the 4container in any suitable manner. In conjunction with the rotor C, the rack B is designed to hold the dishes in the arrangement hereinbefore stated, i. e., in a position whereby the sprays projected from the holes 16 in the rotor C will sweep over the dishes in a progressively For this purpose, I have arranged holding members or guides 30 set at such angles that the sprays emanating from the holes 16 will first contact the inner edges of objects set between the guides 30',

the drawings. In this connection it is also,

understood that the centrifugal force applied to the projected water is advantageous in forcing the sheet of water outwardly over the surface of the dish. In respect to the washing action of the water, I may cause the water to first contact the outeredge of the dishes and progress inwardly. In this arrangement the trend of the holes 16 with respect to the trend of the dishes in the rack would be such that the outer holes on the rotor C would be in advance of the inner holes. My invention is to be understood to vinclude this arrangement also.

It is to be understood that means for holding silverware or other odd shaped articles may also be provided in conjunction with this particular type of rack and in the central part I have shown a receptacle 31, which may be utilized for holding cups or other small articles.

Although I have shown my rack as being formed of bent Wires, nevertheless, I am aware that other materials may be used to produce the desired results, consequently, no detailed description of the method of forming the wires into a rack of this nature will be entered, deeming it sufficient to state that the guide members 30, which may be either of wire or any other material, are arranged to hold the dishes in the prescribedzmanner.

I am also aware that the hood or container A may take various forms, and that the rotor C may also be constructed of various materials. The only limitation that I desire to put upon the construction of the ro-` tor C is with respect to the particular S shape of the rotor with adjustable means for varying the speed of the rotor.

In the foregoing, I have shown and described a specific embodiment of my invention, nevertheless, I reserve the right to make suchl alterations and modifications in the way of refinements that come withiny the scope of the disclosure and fall within the essence of the invention as expressed in the claims.

` I claim as my invention:

1. A washing device of the character described including a rack having means for holding a plurality of objects so that each object is substantially vertical and non-coincithe center of the object and a given vertical t axis, and asprayer'below the rack rotatable about said vertical axis, the sprayer having a plurality of radially spaced openings for discharging' Huid upwardly against said objects, aline passing through the centeis of said openings being curved whereby the openings are related to the rack to discharge Huid to successively strike each object in horizontal progression during rotation of the sprayer. l;

2. A washing device of the character de` scribed including, a rack having means for holding an object substantially vertical and non-coincident with any vertical plane passing through the center of the object vand a given vertical axis, and a sprayer below the rack rotatable about said vertical axis, the sprayer being longitudinally curved to be substantially S-shaped in plan elevation and to have two curved radial arms, the arms having a plurality of longitudinally spaced openings, a line passing'through the centers of said openings substantially following the plan coniiguration of the sprayer whereby the o nings'are related to the rack to project uid upwardly to strike a surface of the object in horizontal v progression ,as the sprayer rotates.

3. In a dish washer, a rack having means forl holding dishes substantially vertically andpositioning the dishes at angles less than 90 with respect to any vertical plane passing through the center of said rack and a dish, and an S shaped sprayer below said rack rotatably mounted between its endsto rotate about a verticalaxis and to have two arcuately curved arms, .there being a plurality'of longitudinally spaced nozzles ineach arm for discharging fluid upwardly against the dishes in the rack, a line passing through the centers of the nozzles of each arm being curved and the 'general trend of said curved line being related to the direction of rotation ofthe sprayer' and to the position of the dishes in the rack so that the nozzles discharge streams of fluid to successively strike the surface of the dishes in horizontal progression in an outward direction as the sprayer rotates.

4. A dishwasher of the character described including, a circular -rack having Y 'provided with a plurality oflongitudinallyY spaced openings for discharging water upwardly against the dishes, and means for rotating the sprayer, lines extending through the centers of the openings in the arms be'- ing curved in a'dir'ection so that the openings are related to the rack and the direction of rotation of the sprayer to dischargev JOHN RQDEWALD.

iso 

